ETSI EN 303 746 V1.1.1 (2021-04)

Maritime Location Systems; Radio transmitters and receivers for radio links in maritime radio location systems operating in the 9 GHz frequency band (X band)

DEN/ERM-TGMAR-611

Pomorski lokacijski sistemi - Radijski oddajniki in sprejemniki za radijske povezave v pomorskih radijskih lokacijskih sistemih, ki delujejo v frekvenčnem pasu 9 GHz (pas X)

General Information

• Status: Not Published
• Technical Committee: ERM TGMARINE - ERM Maritime and radio amateur activities
• Current Stage: 12 - Completion
• Due Date: 30-Apr-2021
• Completion Date: 21-Apr-2021
• Ref Project: SIST EN 303 746 V1.1.1:2021 - Maritime Location Systems - Radio transmitters and receivers for radio links in maritime radio location systems operating in the 9 GHz frequency band (X band)

Standards Content (Sample)

Draft ETSI EN 303 746 V1.0.1 (2020-08)

EUROPEAN STANDARD
Maritime Location Systems;
Radio transmitters and receivers for communication links
operating in the 9 GHz frequency band (X band)

2 Draft ETSI EN 303 746 V1.0.1 (2020-08)

Reference
DEN/ERM-TGMAR-611
Keywords
location, maritime, radio
ETSI
650 Route des Lucioles
F-06921 Sophia Antipolis Cedex - FRANCE

Tel.: [phone]  Fax: [phone]

Siret N° 348 623 562 00017 - NAF 742 C
Association à but non lucratif enregistrée à la
Sous-Préfecture de Grasse (06) N° 7803/88

Important notice
The present document can be downloaded from:
http://www.etsi.org/standards-search
The present document may be made available in electronic versions and/or in print. The content of any electronic and/or
print versions of the present document shall not be modified without the prior written authorization of ETSI. In case of any
existing or perceived difference in contents between such versions and/or in print, the prevailing version of an ETSI
deliverable is the one made publicly available in PDF format at www.etsi.org/deliver.
Users of the present document should be aware that the document may be subject to revision or change of status.
Information on the current status of this and other ETSI documents is available at
https://portal.etsi.org/TB/ETSIDeliverableStatus.aspx
If you find errors in the present document, please send your comment to one of the following services:
https://portal.etsi.org/People/CommiteeSupportStaff.aspx
Copyright Notification
No part may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying
and microfilm except as authorized by written permission of ETSI.
The content of the PDF version shall not be modified without the written authorization of ETSI.
The copyright and the foregoing restriction extend to reproduction in all media.

© ETSI 2020.
All rights reserved.
DECT™, PLUGTESTS™, UMTS™ and the ETSI logo are trademarks of ETSI registered for the benefit of its Members.

3GPP™ and LTE™ are trademarks of ETSI registered for the benefit of its Members and
of the 3GPP Organizational Partners.
oneM2M™ logo is a trademark of ETSI registered for the benefit of its Members and
of the oneM2M Partners. ®
GSM and the GSM logo are trademarks registered and owned by the GSM Association.
ETSI
3 Draft ETSI EN 303 746 V1.0.1 (2020-08)
Contents
Intellectual Property Rights . 5
Foreword . 5
Modal verbs terminology . 5
Introduction . 5
1 Scope . 6
2 References . 6
2.1 Normative references . 6
2.2 Informative references . 6
3 Definition of terms, symbols and abbreviations . 7
3.1 Terms . 7
3.2 Symbols . 7
3.3 Abbreviations . 7
4 Technical requirements . 8
4.1 Environmental profile . 8
4.2 Construction . 8
4.3 Controls and indicators . 8
4.4 Safety precautions . 8
4.5 Labelling. 9
4.6 Frequencies. 9
4.7 Polarization. 9
4.8 Transceiver data interface. 9
5 General conditions of measurements . 9
5.1 Test site and general arrangements for measurements . 9
5.2 General . 10
5.3 Impedance . 10
5.4 Tests of equipment with a notch filter . 10
5.5 Facilities for access . 10
5.5.1 Coupling arrangements . 10
5.6 Modes of operation of the transmitter . 10
6 Test conditions . 10
6.1 General . 10
6.2 Test signals . 10
6.3 Normal test conditions . 11
6.3.1 Normal temperature and humidity . 11
6.3.2 Normal power source . 11
6.3.2.1 Mains voltage and frequency . 11
6.3.2.2 Battery power source. 11
6.3.2.3 Other power sources . 11
6.4 Extreme test conditions . 11
6.4.1 General requirements . 11
6.4.2 Extreme temperatures . 11
6.4.3 Extreme values of test power source . 11
6.4.3.1 Mains voltage and frequency . 11
6.4.3.2 Battery power source. 11
6.4.3.3 Other power sources . 11
6.4.4 Procedure for tests at extreme temperatures . 12
7 Environmental tests . 12
7.1 General requirements . 12
7.2 Procedure . 12
7.3 Performance check . 12
7.4 Vibration tests . 12
7.4.1 Purpose . 12
ETSI
4 Draft ETSI EN 303 746 V1.0.1 (2020-08)
7.4.2 Method of measurement . 12
7.4.3 Requirement . 13
7.5 Damp heat . 13
7.5.1 Purpose . 13
7.5.2 Method of measurement . 13
7.5.3 Requirement . 13
8 Transmitter . 13
8.1 Frequency error . 13
8.1.1 Definition . 13
8.1.2 Method of measurement . 13
8.1.3 Limit . 14
8.2 Transmitter EIRP . 14
8.2.1 Definition . 14
8.2.2 Method of measurement . 14
8.2.3 Limit . 14
8.3 Transmitter B bandwidth . 14
-40dB
8.3.1 Definition . 14
8.3.2 Method of measurement . 14
8.3.3 Limit . 14
8.4 Transmitter out-of-band emissions . 14
8.4.1 Definition . 14
8.4.2 Method of measurement . 15
8.4.3 Limit . 15
8.5 Transmitter spurious emissions . 15
8.5.1 Definition . 15
8.5.2 Method of measurement . 15
8.5.3 Limit . 16
8.6 Standby mode emissions . 16
8.6.1 Definition . 16
8.6.2 Method of measurement . 16
8.6.3 Limits . 16
9 Receiver . 16
9.1 Maximum usable sensitivity . 16
9.1.1 Definition . 16
9.1.2 Method of measurement . 16
9.1.3 Limit . 17
9.2 Co-channel rejection. 17
9.2.1 Definition . 17
9.2.2 Method of measurement . 17
9.2.3 Limit . 17
9.3 Adjacent channel selectivity . 17
9.3.1 Definition . 17
9.3.2 Method of measurement . 17
9.3.3 Limit . 18
9.4 Blocking . 18
9.4.1 Definition . 18
9.4.2 Method of measurement . 18
9.4.3 Limit . 18
10 Testing for compliance with technical requirements . 19
10.1 Environmental conditions for testing . 19
10.2 Interpretation of the measurement results . 19
History . 20

ETSI
5 Draft ETSI EN 303 746 V1.0.1 (2020-08)
Intellectual Property Rights
Essential patents
IPRs essential or potentially essential to normative deliverables may have been declared to ETSI. The information
pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found
in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in
respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web
server (https://ipr.etsi.org/).
Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee
can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web
server) which are, or may be, or may become, essential to the present document.
Trademarks
The present document may include trademarks and/or tradenames which are asserted and/or registered by their owners.
ETSI claims no ownership of these except for any which are indicated as being the property of ETSI, and conveys no
right to use or reproduce any trademark and/or tradename. Mention of those trademarks in the present document does
not constitute an endorsement by ETSI of products, services or organizations associated with those trademarks.
Foreword
This draft European Standard (EN) has been produced by ETSI Technical Committee Electromagnetic compatibility
and Radio spectrum Matters (ERM), and is now submitted for the combined Public Enquiry and Vote phase of the ETSI
standards EN Approval Procedure.

Proposed national transposition dates
Date of latest announcement of this EN (doa): 3 months after ETSI publication
Date of latest publication of new National Standard
or endorsement of this EN (dop/e): 6 months after doa
Date of withdrawal of any conflicting National Standard (dow): 6 months after doa

Modal verbs terminology
In the present document "shall", "shall not", "should", "should not", "may", "need not", "will", "will not", "can" and
"cannot" are to be interpreted as described in clause 3.2 of the ETSI Drafting Rules (Verbal forms for the expression of
provisions).
"must" and "must not" are NOT allowed in ETSI deliverables except when used in direct citation.
Introduction
The present document applies to systems utilizing radio communication links between platforms and vessels for
dynamic positioning of vessels engaged in coordinated maritime activities.

ETSI
6 Draft ETSI EN 303 746 V1.0.1 (2020-08)
1 Scope
The present document specifies technical characteristics and methods of measurements for radiolocation equipment
with the following characteristics:
• intended to operate with maritime dynamic positioning systems functioning with full duplex links with
30 MHz separation operating;
• operating in the 9 GHz frequency band;
• with an integral antenna.
2 References
2.1 Normative references
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the
referenced document (including any amendments) applies.
Referenced documents which are not found to be publicly available in the expected location might be found at
https://docbox.etsi.org/Reference/.
NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee
their long term validity.
The following referenced documents are necessary for the application of the present document.
[1] Recommendation ITU-T E.161 (02-2001): "Arrangement of digits, letters and symbols on
telephones and other devices that can be used for gaining access to a telephone network".
[2] ISO 25862:2019: "Ships and marine technology -- Marine magnetic compasses, binnacles and
azimuth reading devices".
[3] ETSI TS 103 052 (V1.1.1) (03-2011): "Electromagnetic compatibility and Radio spectrum Matters
(ERM); Radiated measurement methods and general arrangements for test sites up to 100 GHz".
[4] ERC Recommendation.74-01 (2019): "Unwanted emissions in the spurious domain".
2.2 Informative references
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the
referenced document (including any amendments) applies.
NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee
their long term validity.
The following referenced documents are not necessary for the application of the present document but they assist the
user with regard to a particular subject area.
Not applicable.
ETSI
7 Draft ETSI EN 303 746 V1.0.1 (2020-08)
3 Definition of terms, symbols and abbreviations
3.1 Terms
Void.
3.2 Symbols
For the purposes of the present document, the following symbols apply:
B Bandwidth
dBm Level (dB) relative to 1 mW
dBpp Level (dB) below peak power
dBµV Level (dB) relative to 1 µV/m
f Frequency
m Meter
-6
ppm Parts per million (10 )
Q Q factor is a resonance parameter
s Second
V Volt
W Watt
Ω Ohm
3.3 Abbreviations
For the purposes of the present document, the following abbreviations apply:
ac alternating current
dc direct current
EIRP Equivalent Isotropically Radiated Power
EN European Norm
ERC European Radiocommunication Committee
EUT Equipment Under Test
FM Frequency Modulation
IPR Intellectual Property Right
ISO International Organization for Standardization
ITU-T International Telecommunication Union - Telecommunication standardization sector
PEP Peak Envelope Power
pp peak power
RF Radio Frequency
Rx Receiver
SR Special Report
TS Technical Specification
Tx Transmitter
VSWR Voltage Standing Wave Ratio
ETSI
8 Draft ETSI EN 303 746 V1.0.1 (2020-08)
4 Technical requirements
4.1 Environmental profile
The technical requirements of the present document apply under the environmental profile for operation of the
equipment, which shall be declared by the manufacturer, but as a minimum, shall be that specified in the test conditions
contained in the present document.
4.2 Construction
The mechanical and electrical construction and finish of the equipment shall conform in all respects to good engineering
practice, and the equipment shall be suitable for use on board
...

Final draft ETSI EN 303 746 V1.1.1 (2021-02)

EUROPEAN STANDARD
Maritime Location Systems;
Radio transmitters and receivers for radio links
in maritime radio location systems
operating in the 9 GHz frequency band (X band)

2 Final draft ETSI EN 303 746 V1.1.1 (2021-02)

Reference
DEN/ERM-TGMAR-611
Keywords
location, maritime, radio
ETSI
650 Route des Lucioles
F-06921 Sophia Antipolis Cedex - FRANCE

Tel.: [phone]  Fax: [phone]

Siret N° 348 623 562 00017 - NAF 742 C
Association à but non lucratif enregistrée à la
Sous-Préfecture de Grasse (06) N° 7803/88

Important notice
The present document can be downloaded from:
http://www.etsi.org/standards-search
The present document may be made available in electronic versions and/or in print. The content of any electronic and/or
print versions of the present document shall not be modified without the prior written authorization of ETSI. In case of any
existing or perceived difference in contents between such versions and/or in print, the prevailing version of an ETSI
deliverable is the one made publicly available in PDF format at www.etsi.org/deliver.
Users of the present document should be aware that the document may be subject to revision or change of status.
Information on the current status of this and other ETSI documents is available at
https://portal.etsi.org/TB/ETSIDeliverableStatus.aspx
If you find errors in the present document, please send your comment to one of the following services:
https://portal.etsi.org/People/CommiteeSupportStaff.aspx
Copyright Notification
No part may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying
and microfilm except as authorized by written permission of ETSI.
The content of the PDF version shall not be modified without the written authorization of ETSI.
The copyright and the foregoing restriction extend to reproduction in all media.

© ETSI 2021.
All rights reserved.
DECT™, PLUGTESTS™, UMTS™ and the ETSI logo are trademarks of ETSI registered for the benefit of its Members.

3GPP™ and LTE™ are trademarks of ETSI registered for the benefit of its Members and
of the 3GPP Organizational Partners.
oneM2M™ logo is a trademark of ETSI registered for the benefit of its Members and
of the oneM2M Partners. ®
GSM and the GSM logo are trademarks registered and owned by the GSM Association.
ETSI
3 Final draft ETSI EN 303 746 V1.1.1 (2021-02)
Contents
Intellectual Property Rights . 5
Foreword . 5
Modal verbs terminology . 5
Introduction . 5
1 Scope . 6
2 References . 6
2.1 Normative references . 6
2.2 Informative references . 6
3 Definition of terms, symbols and abbreviations . 7
3.1 Terms . 7
3.2 Symbols . 7
3.3 Abbreviations . 7
4 Technical requirements . 8
4.1 Environmental profile . 8
4.2 Construction . 8
4.3 Controls and indicators . 8
4.4 Safety precautions . 8
4.5 Labelling. 9
4.6 Frequencies. 9
4.7 Polarization. 9
4.8 Transceiver data interface. 9
5 General conditions of measurements . 9
5.1 Test site and general arrangements for measurements . 9
5.2 General . 9
5.3 Impedance . 10
5.4 Tests of equipment with a notch filter . 10
5.5 Facilities for access . 10
5.5.1 Coupling arrangements . 10
5.6 Modes of operation of the transmitter . 10
6 Test conditions . 10
6.1 General . 10
6.2 Test signals . 10
6.3 Normal test conditions . 10
6.3.1 Normal temperature and humidity . 10
6.3.2 Normal power source . 11
6.3.2.1 Mains voltage and frequency . 11
6.3.2.2 Battery power source. 11
6.3.2.3 Other power sources . 11
6.4 Extreme test conditions . 11
6.4.1 General requirements . 11
6.4.2 Extreme temperatures . 11
6.4.3 Extreme values of test power source . 11
6.4.3.1 Mains voltage and frequency . 11
6.4.3.2 Battery power source. 11
6.4.3.3 Other power sources . 11
6.4.4 Procedure for tests at extreme temperatures . 11
7 Environmental tests . 12
7.1 General requirements . 12
7.2 Procedure . 12
7.3 Performance check . 12
7.4 Vibration tests . 12
7.4.1 Purpose . 12
ETSI
4 Final draft ETSI EN 303 746 V1.1.1 (2021-02)
7.4.2 Method of measurement . 12
7.4.3 Requirement . 13
7.5 Damp heat . 13
7.5.1 Purpose . 13
7.5.2 Method of measurement . 13
7.5.3 Requirement . 13
8 Transmitter . 13
8.1 Frequency error . 13
8.1.1 Definition . 13
8.1.2 Method of measurement . 13
8.1.3 Limit . 13
8.2 Transmitter EIRP . 13
8.2.1 Definition . 13
8.2.2 Method of measurement . 14
8.2.3 Limit . 14
8.3 Transmitter B bandwidth . 14
-40 dB
8.3.1 Definition . 14
8.3.2 Method of measurement . 14
8.3.3 Limit . 14
8.4 Transmitter out-of-band emissions . 14
8.4.1 Definition . 14
8.4.2 Method of measurement . 14
8.4.3 Limit . 15
8.5 Transmitter spurious emissions . 15
8.5.1 Definition . 15
8.5.2 Method of measurement . 15
8.5.3 Limit . 16
8.6 Standby mode emissions . 16
8.6.1 Definition . 16
8.6.2 Method of measurement . 16
8.6.3 Limits . 16
9 Receiver . 16
9.1 Maximum usable sensitivity . 16
9.1.1 Definition . 16
9.1.2 Method of measurement . 16
9.1.3 Limit . 16
9.2 Co-channel rejection. 17
9.2.1 Definition . 17
9.2.2 Method of measurement . 17
9.2.3 Limit . 17
9.3 Adjacent channel selectivity . 17
9.3.1 Definition . 17
9.3.2 Method of measurement . 17
9.3.3 Limit . 18
9.4 Blocking . 18
9.4.1 Definition . 18
9.4.2 Method of measurement . 18
9.4.3 Limit . 18
10 Testing for compliance with technical requirements . 18
10.1 Environmental conditions for testing . 18
10.2 Interpretation of the measurement results . 19
History . 20

ETSI
5 Final draft ETSI EN 303 746 V1.1.1 (2021-02)
Intellectual Property Rights
Essential patents
IPRs essential or potentially essential to normative deliverables may have been declared to ETSI. The information
pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found
in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in
respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web
server (https://ipr.etsi.org/).
Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee
can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web
server) which are, or may be, or may become, essential to the present document.
Trademarks
The present document may include trademarks and/or tradenames which are asserted and/or registered by their owners.
ETSI claims no ownership of these except for any which are indicated as being the property of ETSI, and conveys no
right to use or reproduce any trademark and/or tradename. Mention of those trademarks in the present document does
not constitute an endorsement by ETSI of products, services or organizations associated with those trademarks.
Foreword
This final draft European Standard (EN) has been produced by ETSI Technical Committee Electromagnetic
compatibility and Radio spectrum Matters (ERM), and is now submitted for the Vote phase of the ETSI standards EN
Approval Procedure.
Proposed national transposition dates
Date of latest announcement of this EN (doa): 3 months after ETSI publication
Date of latest publication of new National Standard
or endorsement of this EN (dop/e): 6 months after doa
Date of withdrawal of any conflicting National Standard (dow): 6 months after doa

Modal verbs terminology
In the present document "shall", "shall not", "should", "should not", "may", "need not", "will", "will not", "can" and
"cannot" are to be interpreted as described in clause 3.2 of the ETSI Drafting Rules (Verbal forms for the expression of
provisions).
"must" and "must not" are NOT allowed in ETSI deliverables except when used in direct citation.
Introduction
The present document applies to systems utilizing radio links between platforms and vessels for dynamic positioning of
vessels engaged in coordinated maritime activities.

ETSI
6 Final draft ETSI EN 303 746 V1.1.1 (2021-02)
1 Scope
The present document specifies technical characteristics and methods of measurements for radiolocation equipment
with the following characteristics:
• intended to operate in maritime dynamic positioning systems functioning with full duplex links having a
duplex separation of 30 MHz;
• operating in the 9 GHz frequency band;
• with an integral antenna.
2 References
2.1 Normative references
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the
referenced document (including any amendments) applies.
Referenced documents which are not found to be publicly available in the expected location might be found at
https://docbox.etsi.org/Reference/.
NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee
their long term validity.
The following referenced documents are necessary for the application of the present document.
[1] Recommendation ITU-T E.161 (02-2001): "Arrangement of digits, letters and symbols on
telephones and other devices that can be used for gaining access to a telephone network".
[2] ISO 25862:2019: "Ships and marine technology -- Marine magnetic compasses, binnacles and
azimuth reading devices".
[3] ETSI TS 103 052 (V1.1.1) (03-2011): "Electromagnetic compatibility and Radio spectrum Matters
(ERM); Radiated measurement methods and general arrangements for test sites up to 100 GHz".
[4] ERC Recommendation 74-01 (2019): "Unwanted emissions in the spurious domain".
[5] ISO 7010:2019: "Graphical symbols - Safety colours and safety signs - Registered safety signs".
2.2 Informative references
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the
referenced document (including any amendments) applies.
NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee
their long term validity.
The following referenced documents are not necessary for the application of the present document but they assist the
user with regard to a particular subject area.
Not applicable.
ETSI
7 Final draft ETSI EN 303 746 V1.1.1 (2021-02)
3 Definition of terms, symbols and abbreviations
3.1 Terms
Void.
3.2 Symbols
For the purposes of the present document, the following symbols apply:
B Bandwidth
dBm Level (dB) relative to 1 mW
dBpp Level (dB) below peak power
dBµV Level (dB) relative to 1 µV/m
f Frequency
m Metre
-6
ppm Parts per million (10 )
Q Q factor is a resonance parameter
s Second
V Volt
W Watt
Ω Ohm
3.3 Abbreviations
For the purposes of the present document, the following abbreviations apply:
ac alternating current
dc direct current
EIRP Equivalent Isotropically Radiated Power
EN European Norm
ERC European Radiocommunication Committee
EUT Equipment Under Test
FM Frequency Modulation
IPR Intellectual Property Right
ISO International Organization for Standardization
ITU-T International Telecommunication Union - Telecommunication standardization sector
PEP Peak Envelope Power
pp peak power
RF Radio Frequency
Rx Receiver
SR Special Report
TS Technical Specification
Tx Transmitter
VSWR Voltage Standing Wave Ratio
ETSI
8 Final draft ETSI EN 303 746 V1.1.1 (2021-02)
4 Technical requirements
4.1 Environmental profile
The technical requirements of the present document apply under the environmental profile for operation of the
equipment, which shall be declared by the manufacturer, but as a minimum, shall be that specified in the test conditions
contained in the present document.
4.2 Construction
The mechanical and electrical construction and finish of the equipment shall conform in all respects to good engineering
practice, and the equipment shall be suitable for use on board ships.
All controls shall be of sufficient size
...

EUROPEAN STANDARD
Maritime Location Systems;
Radio transmitters and receivers for radio links
in maritime radio location systems
operating in the 9 GHz frequency band (X band)

2 ETSI EN 303 746 V1.1.1 (2021-04)

Reference
DEN/ERM-TGMAR-611
Keywords
location, maritime, radio
ETSI
650 Route des Lucioles
F-06921 Sophia Antipolis Cedex - FRANCE

Tel.: [phone]  Fax: [phone]

Siret N° 348 623 562 00017 - APE 7112B
Association à but non lucratif enregistrée à la
Sous-Préfecture de Grasse (06) N° w061004871

Important notice
The present document can be downloaded from:
http://www.etsi.org/standards-search
The present document may be made available in electronic versions and/or in print. The content of any electronic and/or
print versions of the present document shall not be modified without the prior written authorization of ETSI. In case of any
existing or perceived difference in contents between such versions and/or in print, the prevailing version of an ETSI
deliverable is the one made publicly available in PDF format at www.etsi.org/deliver.
Users of the present document should be aware that the document may be subject to revision or change of status.
Information on the current status of this and other ETSI documents is available at
https://portal.etsi.org/TB/ETSIDeliverableStatus.aspx
If you find errors in the present document, please send your comment to one of the following services:
https://portal.etsi.org/People/CommiteeSupportStaff.aspx
Notice of disclaimer & limitation of liability
The information provided in the present deliverable is directed solely to professionals who have the appropriate degree of
experience to understand and interpret its content in accordance with generally accepted engineering or
other professional standard and applicable regulations.
No recommendation as to products and services or vendors is made or should be implied.
In no event shall ETSI be held liable for loss of profits or any other incidental or consequential damages.

Any software contained in this deliverable is provided "AS IS" with no warranties, express or implied, including but not
limited to, the warranties of merchantability, fitness for a particular purpose and non-infringement of intellectual property
rights and ETSI shall not be held liable in any event for any damages whatsoever (including, without limitation, damages
for loss of profits, business interruption, loss of information, or any other pecuniary loss) arising out of or related to the use
of or inability to use the software.
Copyright Notification
No part may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and
microfilm except as authorized by written permission of ETSI.
The content of the PDF version shall not be modified without the written authorization of ETSI.
The copyright and the foregoing restriction extend to reproduction in all media.

© ETSI 2021.
All rights reserved.
ETSI
3 ETSI EN 303 746 V1.1.1 (2021-04)
Contents
Intellectual Property Rights . 5
Foreword . 5
Modal verbs terminology . 5
Introduction . 6
1 Scope . 7
2 References . 7
2.1 Normative references . 7
2.2 Informative references . 7
3 Definition of terms, symbols and abbreviations . 8
3.1 Terms . 8
3.2 Symbols . 8
3.3 Abbreviations . 8
4 Technical requirements . 9
4.1 Environmental profile . 9
4.2 Construction . 9
4.3 Controls and indicators . 9
4.4 Safety precautions . 9
4.5 Labelling. 10
4.6 Frequencies. 10
4.7 Polarization. 10
4.8 Transceiver data interface. 10
5 General conditions of measurements . 10
5.1 Test site and general arrangements for measurements . 10
5.2 General . 10
5.3 Impedance . 11
5.4 Tests of equipment with a notch filter . 11
5.5 Facilities for access . 11
5.5.1 Coupling arrangements . 11
5.6 Modes of operation of the transmitter . 11
6 Test conditions . 11
6.1 General . 11
6.2 Test signals . 11
6.3 Normal test conditions . 11
6.3.1 Normal temperature and humidity . 11
6.3.2 Normal power source . 12
6.3.2.1 Mains voltage and frequency . 12
6.3.2.2 Battery power source. 12
6.3.2.3 Other power sources . 12
6.4 Extreme test conditions . 12
6.4.1 General requirements . 12
6.4.2 Extreme temperatures . 12
6.4.3 Extreme values of test power source . 12
6.4.3.1 Mains voltage and frequency . 12
6.4.3.2 Battery power source. 12
6.4.3.3 Other power sources . 12
6.4.4 Procedure for tests at extreme temperatures . 12
7 Environmental tests . 13
7.1 General requirements . 13
7.2 Procedure . 13
7.3 Performance check . 13
7.4 Vibration tests . 13
7.4.1 Purpose . 13
ETSI
4 ETSI EN 303 746 V1.1.1 (2021-04)
7.4.2 Method of measurement . 13
7.4.3 Requirement . 14
7.5 Damp heat . 14
7.5.1 Purpose . 14
7.5.2 Method of measurement . 14
7.5.3 Requirement . 14
8 Transmitter . 14
8.1 Frequency error . 14
8.1.1 Definition . 14
8.1.2 Method of measurement . 14
8.1.3 Limit . 14
8.2 Transmitter EIRP . 14
8.2.1 Definition . 14
8.2.2 Method of measurement . 15
8.2.3 Limit . 15
8.3 Transmitter B bandwidth . 15
-40 dB
8.3.1 Definition . 15
8.3.2 Method of measurement . 15
8.3.3 Limit . 15
8.4 Transmitter out-of-band emissions . 15
8.4.1 Definition . 15
8.4.2 Method of measurement . 15
8.4.3 Limit . 16
8.5 Transmitter spurious emissions . 16
8.5.1 Definition . 16
8.5.2 Method of measurement . 16
8.5.3 Limit . 17
8.6 Standby mode emissions . 17
8.6.1 Definition . 17
8.6.2 Method of measurement . 17
8.6.3 Limits . 17
9 Receiver . 17
9.1 Maximum usable sensitivity . 17
9.1.1 Definition . 17
9.1.2 Method of measurement . 17
9.1.3 Limit . 17
9.2 Co-channel rejection. 18
9.2.1 Definition . 18
9.2.2 Method of measurement . 18
9.2.3 Limit . 18
9.3 Adjacent channel selectivity . 18
9.3.1 Definition . 18
9.3.2 Method of measurement . 18
9.3.3 Limit . 19
9.4 Blocking . 19
9.4.1 Definition . 19
9.4.2 Method of measurement . 19
9.4.3 Limit . 19
10 Testing for compliance with technical requirements . 19
10.1 Environmental conditions for testing . 19
10.2 Interpretation of the measurement results . 20
History . 21

ETSI
5 ETSI EN 303 746 V1.1.1 (2021-04)
Intellectual Property Rights
Essential patents
IPRs essential or potentially essential to normative deliverables may have been declared to ETSI. The declarations
pertaining to these essential IPRs, if any, are publicly available for ETSI members and non-members, and can be
found in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to
ETSI in respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the
ETSI Web server (https://ipr.etsi.org/).
Pursuant to the ETSI Directives including the ETSI IPR Policy, no investigation regarding the essentiality of IPRs,
including IPR searches, has been carried out by ETSI. No guarantee can be given as to the existence of other IPRs not
referenced in ETSI SR 000 314 (or the updates on the ETSI Web server) which are, or may be, or may become,
essential to the present document.
Trademarks
The present document may include trademarks and/or tradenames which are asserted and/or registered by their owners.
ETSI claims no ownership of these except for any which are indicated as being the property of ETSI, and conveys no
right to use or reproduce any trademark and/or tradename. Mention of those trademarks in the present document does
not constitute an endorsement by ETSI of products, services or organizations associated with those trademarks.
DECT™, PLUGTESTS™, UMTS™ and the ETSI logo are trademarks of ETSI registered for the benefit of its

Members. 3GPP™ and LTE™ are trademarks of ETSI registered for the benefit of its Members and of the 3GPP
Organizational Partners. oneM2M™ logo is a trademark of ETSI registered for the benefit of its Members and of the ®
oneM2M Partners. GSM and the GSM logo are trademarks registered and owned by the GSM Association.
Foreword
This European Standard (EN) has been produced by ETSI Technical Committee Electromagnetic compatibility and
Radio spectrum Matters (ERM).
National transposition dates
Date of adoption of this EN: 16 April 2021
Date of latest announcement of this EN (doa): 31 July 2021
Date of latest publication of new National Standard
or endorsement of this EN (dop/e): 31 January 2022
Date of withdrawal of any conflicting National Standard (dow): 31 January 2022

Modal verbs terminology
In the present document "shall", "shall not", "should", "should not", "may", "need not", "will", "will not", "can" and
"cannot" are to be interpreted as described in clause 3.2 of the ETSI Drafting Rules (Verbal forms for the expression of
provisions).
"must" and "must not" are NOT allowed in ETSI deliverables except when used in direct citation.
ETSI
6 ETSI EN 303 746 V1.1.1 (2021-04)
Introduction
The present document applies to systems utilizing radio links between platforms and vessels for dynamic positioning of
vessels engaged in coordinated maritime activities.

ETSI
7 ETSI EN 303 746 V1.1.1 (2021-04)
1 Scope
The present document specifies technical characteristics and methods of measurements for radiolocation equipment
with the following characteristics:
• intended to operate in maritime dynamic positioning systems functioning with full duplex links having a
duplex separation of 30 MHz;
• operating in the 9 GHz frequency band;
• with an integral antenna.
2 References
2.1 Normative references
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the
referenced document (including any amendments) applies.
Referenced documents which are not found to be publicly available in the expected location might be found at
https://docbox.etsi.org/Reference/.
NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee
their long term validity.
The following referenced documents are necessary for the application of the present document.
[1] Recommendation ITU-T E.161 (02-2001): "Arrangement of digits, letters and symbols on
telephones and other devices that can be used for gaining access to a telephone network".
[2] ISO 25862:2019: "Ships and marine technology -- Marine magnetic compasses, binnacles and
azimuth reading devices".
[3] ETSI TS 103 052 (V1.1.1) (03-2011): "Electromagnetic compatibility and Radio spectrum Matters
(ERM); Radiated measurement methods and general arrangements for test sites up to 100 GHz".
[4] ERC Recommendation 74-01 (2019): "Unwanted emissions in the spurious domain".
[5] ISO 7010:2019: "Graphical symbols - Safety colours and safety signs - Registered safety signs".
2.2 Informative references
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the
referenced document (including any amendments) applies.
NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee
their long term validity.
The following referenced documents are not necessary for the application of the present document but they assist the
user with regard to a particular subject area.
Not applicable.
ETSI
8 ETSI EN 303 746 V1.1.1 (2021-04)
3 Definition of terms, symbols and abbreviations
3.1 Terms
Void.
3.2 Symbols
For the purposes of the present document, the following symbols apply:
B Bandwidth
dBm Level (dB) relative to 1 mW
dBpp Level (dB) below peak power
dBµV Level (dB) relative to 1 µV/m
f Frequency
m Metre
-6
ppm Parts per million (10 )
Q Q factor is a resonance parameter
s Second
V Volt
W Watt
Ω Ohm
3.3 Abbreviations
For the purposes of the present document, the following abbreviations apply:
ac alternating current
dc direct current
EIRP Equivalent Isotropically Radiated Power
EN European Norm
ERC European Radiocommunication Committee
EUT Equipment Under Test
FM Frequency Modulation
IPR Intellectual Property Right
ISO International Organization for Standardization
ITU-T International Telecommunication Union - Telecommunication standardization sector
PEP Peak Envelope Power
pp peak power
RF Radio Frequency
Rx Receiver
SR Special Report
TS Technical Specification
Tx Transmitter
VSWR Voltage Standing Wave Ratio
ETSI
9 ETSI EN 303 746 V1.1.1 (2021-
...

SLOVENSKI STANDARD
01-junij-2021
Pomorski lokacijski sistemi - Radijski oddajniki in sprejemniki za radijske
povezave v pomorskih radijskih lokacijskih sistemih, ki delujejo v frekvenčnem
pasu 9 GHz (pas X)
Maritime Location Systems - Radio transmitters and receivers for radio links in maritime
radio location systems operating in the 9 GHz frequency band (X band)
Ta slovenski standard je istoveten z: ETSI EN 303 746 V1.1.1 (2021-04)
ICS:
33.060.20 Sprejemna in oddajna Receiving and transmitting
oprema equipment
47.020.70 Navigacijska in krmilna Navigation and control
oprema equipment
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
Maritime Location Systems;
Radio transmitters and receivers for radio links
in maritime radio location systems
operating in the 9 GHz frequency band (X band)

2 ETSI EN 303 746 V1.1.1 (2021-04)

Reference
DEN/ERM-TGMAR-611
Keywords
location, maritime, radio
ETSI
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experience to understand and interpret its content in accordance with generally accepted engineering or
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In no event shall ETSI be held liable for loss of profits or any other incidental or consequential damages.

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No part may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and
microfilm except as authorized by written permission of ETSI.
The content of the PDF version shall not be modified without the written authorization of ETSI.
The copyright and the foregoing restriction extend to reproduction in all media.

© ETSI 2021.
All rights reserved.
ETSI
3 ETSI EN 303 746 V1.1.1 (2021-04)
Contents
Intellectual Property Rights . 5
Foreword . 5
Modal verbs terminology . 5
Introduction . 6
1 Scope . 7
2 References . 7
2.1 Normative references . 7
2.2 Informative references . 7
3 Definition of terms, symbols and abbreviations . 8
3.1 Terms . 8
3.2 Symbols . 8
3.3 Abbreviations . 8
4 Technical requirements . 9
4.1 Environmental profile . 9
4.2 Construction . 9
4.3 Controls and indicators . 9
4.4 Safety precautions . 9
4.5 Labelling. 10
4.6 Frequencies. 10
4.7 Polarization. 10
4.8 Transceiver data interface. 10
5 General conditions of measurements . 10
5.1 Test site and general arrangements for measurements . 10
5.2 General . 10
5.3 Impedance . 11
5.4 Tests of equipment with a notch filter . 11
5.5 Facilities for access . 11
5.5.1 Coupling arrangements . 11
5.6 Modes of operation of the transmitter . 11
6 Test conditions . 11
6.1 General . 11
6.2 Test signals . 11
6.3 Normal test conditions . 11
6.3.1 Normal temperature and humidity . 11
6.3.2 Normal power source . 12
6.3.2.1 Mains voltage and frequency . 12
6.3.2.2 Battery power source. 12
6.3.2.3 Other power sources . 12
6.4 Extreme test conditions . 12
6.4.1 General requirements . 12
6.4.2 Extreme temperatures . 12
6.4.3 Extreme values of test power source . 12
6.4.3.1 Mains voltage and frequency . 12
6.4.3.2 Battery power source. 12
6.4.3.3 Other power sources . 12
6.4.4 Procedure for tests at extreme temperatures . 12
7 Environmental tests . 13
7.1 General requirements . 13
7.2 Procedure . 13
7.3 Performance check . 13
7.4 Vibration tests . 13
7.4.1 Purpose . 13
ETSI
4 ETSI EN 303 746 V1.1.1 (2021-04)
7.4.2 Method of measurement . 13
7.4.3 Requirement . 14
7.5 Damp heat . 14
7.5.1 Purpose . 14
7.5.2 Method of measurement . 14
7.5.3 Requirement . 14
8 Transmitter . 14
8.1 Frequency error . 14
8.1.1 Definition . 14
8.1.2 Method of measurement . 14
8.1.3 Limit . 14
8.2 Transmitter EIRP . 14
8.2.1 Definition . 14
8.2.2 Method of measurement . 15
8.2.3 Limit . 15
8.3 Transmitter B bandwidth . 15
-40 dB
8.3.1 Definition . 15
8.3.2 Method of measurement . 15
8.3.3 Limit . 15
8.4 Transmitter out-of-band emissions . 15
8.4.1 Definition . 15
8.4.2 Method of measurement . 15
8.4.3 Limit . 16
8.5 Transmitter spurious emissions . 16
8.5.1 Definition . 16
8.5.2 Method of measurement . 16
8.5.3 Limit . 17
8.6 Standby mode emissions . 17
8.6.1 Definition . 17
8.6.2 Method of measurement . 17
8.6.3 Limits . 17
9 Receiver . 17
9.1 Maximum usable sensitivity . 17
9.1.1 Definition . 17
9.1.2 Method of measurement . 17
9.1.3 Limit . 17
9.2 Co-channel rejection. 18
9.2.1 Definition . 18
9.2.2 Method of measurement . 18
9.2.3 Limit . 18
9.3 Adjacent channel selectivity . 18
9.3.1 Definition . 18
9.3.2 Method of measurement . 18
9.3.3 Limit . 19
9.4 Blocking . 19
9.4.1 Definition . 19
9.4.2 Method of measurement . 19
9.4.3 Limit . 19
10 Testing for compliance with technical requirements . 19
10.1 Environmental conditions for testing . 19
10.2 Interpretation of the measurement results . 20
History . 21

ETSI
5 ETSI EN 303 746 V1.1.1 (2021-04)
Intellectual Property Rights
Essential patents
IPRs essential or potentially essential to normative deliverables may have been declared to ETSI. The declarations
pertaining to these essential IPRs, if any, are publicly available for ETSI members and non-members, and can be
found in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to
ETSI in respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the
ETSI Web server (https://ipr.etsi.org/).
Pursuant to the ETSI Directives including the ETSI IPR Policy, no investigation regarding the essentiality of IPRs,
including IPR searches, has been carried out by ETSI. No guarantee can be given as to the existence of other IPRs not
referenced in ETSI SR 000 314 (or the updates on the ETSI Web server) which are, or may be, or may become,
essential to the present document.
Trademarks
The present document may include trademarks and/or tradenames which are asserted and/or registered by their owners.
ETSI claims no ownership of these except for any which are indicated as being the property of ETSI, and conveys no
right to use or reproduce any trademark and/or tradename. Mention of those trademarks in the present document does
not constitute an endorsement by ETSI of products, services or organizations associated with those trademarks.
DECT™, PLUGTESTS™, UMTS™ and the ETSI logo are trademarks of ETSI registered for the benefit of its

Members. 3GPP™ and LTE™ are trademarks of ETSI registered for the benefit of its Members and of the 3GPP
Organizational Partners. oneM2M™ logo is a trademark of ETSI registered for the benefit of its Members and of the ®
oneM2M Partners. GSM and the GSM logo are trademarks registered and owned by the GSM Association.
Foreword
This European Standard (EN) has been produced by ETSI Technical Committee Electromagnetic compatibility and
Radio spectrum Matters (ERM).
National transposition dates
Date of adoption of this EN: 16 April 2021
Date of latest announcement of this EN (doa): 31 July 2021
Date of latest publication of new National Standard
or endorsement of this EN (dop/e): 31 January 2022
Date of withdrawal of any conflicting National Standard (dow): 31 January 2022

Modal verbs terminology
In the present document "shall", "shall not", "should", "should not", "may", "need not", "will", "will not", "can" and
"cannot" are to be interpreted as described in clause 3.2 of the ETSI Drafting Rules (Verbal forms for the expression of
provisions).
"must" and "must not" are NOT allowed in ETSI deliverables except when used in direct citation.
ETSI
6 ETSI EN 303 746 V1.1.1 (2021-04)
Introduction
The present document applies to systems utilizing radio links between platforms and vessels for dynamic positioning of
vessels engaged in coordinated maritime activities.

ETSI
7 ETSI EN 303 746 V1.1.1 (2021-04)
1 Scope
The present document specifies technical characteristics and methods of measurements for radiolocation equipment
with the following characteristics:
• intended to operate in maritime dynamic positioning systems functioning with full duplex links having a
duplex separation of 30 MHz;
• operating in the 9 GHz frequency band;
• with an integral antenna.
2 References
2.1 Normative references
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the
referenced document (including any amendments) applies.
Referenced documents which are not found to be publicly available in the expected location might be found at
https://docbox.etsi.org/Reference/.
NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee
their long term validity.
The following referenced documents are necessary for the application of the present document.
[1] Recommendation ITU-T E.161 (02-2001): "Arrangement of digits, letters and symbols on
telephones and other devices that can be used for gaining access to a telephone network".
[2] ISO 25862:2019: "Ships and marine technology -- Marine magnetic compasses, binnacles and
azimuth reading devices".
[3] ETSI TS 103 052 (V1.1.1) (03-2011): "Electromagnetic compatibility and Radio spectrum Matters
(ERM); Radiated measurement methods and general arrangements for test sites up to 100 GHz".
[4] ERC Recommendation 74-01 (2019): "Unwanted emissions in the spurious domain".
[5] ISO 7010:2019: "Graphical symbols - Safety colours and safety signs - Registered safety signs".
2.2 Informative references
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the
referenced document (including any amendments) applies.
NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee
their long term validity.
The following referenced documents are not necessary for the application of the present document but they assist the
user with regard to a particular subject area.
Not applicable.
ETSI
8 ETSI EN 303 746 V1.1.1 (2021-04)
3 Definition of terms, symbols and abbreviations
3.1 Terms
Void.
3.2 Symbols
For the purposes of the present document, the following symbols apply:
B Bandwidth
dBm Level (dB) relative to 1 mW
dBpp Level (dB) below peak power
dBµV Level (dB) relative to 1 µV/m
f Frequency
m Metre
-6
ppm Parts per million (10 )
Q Q factor is a resonance parameter
s Second
V Volt
W Watt
Ω Ohm
3.3 Abbreviations
For the purposes of the present document, the following abbreviations apply:
ac alternating current
dc direct current
EIRP Equivalent Isotropically Radiated Power
EN European Norm
ERC European Radiocommunication Committee
EUT Equipment Under Test
FM Frequency Modulation
IPR Intellectual Property Right
ISO International Organizat
...